All packages are not available for download! The following packages are not available
檢視原始碼的時候提醒這個錯誤，解決辦法很簡單
implementation ‘com.android.support:appcompat-v7:27.1.1’
降低appcompat的版本號，之前是28，後來改成27.1.1就可以了
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檢視原始碼的時候提醒這個錯誤，解決辦法很簡單 implementation ‘com.android.support:appcompat-v7:27.1.1’ 降低appcompat的版本號
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